Examine source code of Tab Refresher Lite

{
  "manifest_version": 2,
  "name": "Tab Refresher Lite",
  "version": "1.0",
  "description": "Refresh the current tab instantly with one click.",
  "permissions": [
    "tabs"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Refresh Tab"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2043ec5c-01ca-478b-8c01-519e364c93dc}"
    }
  }
}